1 /* $NetBSD: kvm_vax.c,v 1.20 2014/02/19 20:21:22 dsl Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software developed by the Computer Systems
8 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
9 * BG 91-66 and contributed to Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 /*
37 * VAX machine dependent routines for kvm. Hopefully, the forthcoming
38 * vm code will one day obsolete this module. Furthermore, I hope it
39 * gets here soon, because this basically is an error stub! (sorry)
40 * This code may not work anyway.
41 */
42
43 #include <sys/param.h>
44 #include <sys/proc.h>
45 #include <sys/stat.h>
46 #include <sys/types.h>
47
48 #include <unistd.h>
49 #include <nlist.h>
50 #include <stdlib.h>
51 #include <kvm.h>
52
53 #include <uvm/uvm_extern.h>
54
55 #include <machine/vmparam.h>
56
57 #include <limits.h>
58 #include <db.h>
59
60 #include "kvm_private.h"
61
62 __RCSID("$NetBSD: kvm_vax.c,v 1.20 2014/02/19 20:21:22 dsl Exp $");
63
64 struct vmstate {
65 u_long end;
66 };
67
68 void
_kvm_freevtop(kvm_t * kd)69 _kvm_freevtop(kvm_t *kd)
70 {
71 if (kd->vmst != 0)
72 free(kd->vmst);
73 }
74
75 int
_kvm_initvtop(kvm_t * kd)76 _kvm_initvtop(kvm_t *kd)
77 {
78 struct vmstate *vm;
79 struct stat st;
80 struct nlist nl[2];
81
82 vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
83 if (vm == 0)
84 return (-1);
85
86 kd->vmst = vm;
87
88 if (fstat(kd->pmfd, &st) < 0)
89 return (-1);
90
91 /* Get end of kernel address */
92 nl[0].n_name = "_end";
93 nl[1].n_name = 0;
94 if (kvm_nlist(kd, nl) != 0) {
95 _kvm_err(kd, kd->program, "pmap_stod: no such symbol");
96 return (-1);
97 }
98 vm->end = (u_long)nl[0].n_value;
99
100 return (0);
101 }
102
103 #define VA_OFF(va) (va & (NBPG - 1))
104
105 /*
106 * Translate a kernel virtual address to a physical address using the
107 * mapping information in kd->vm. Returns the result in pa, and returns
108 * the number of bytes that are contiguously available from this
109 * physical address. This routine is used only for crash dumps.
110 */
111 int
_kvm_kvatop(kvm_t * kd,vaddr_t va,paddr_t * pa)112 _kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
113 {
114 u_long end;
115
116 if (va < (u_long) KERNBASE) {
117 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
118 (u_long)KERNBASE);
119 return (0);
120 }
121
122 end = kd->vmst->end;
123 if (va >= end) {
124 _kvm_err(kd, 0, "invalid address (%#"PRIxVADDR"<%lx)", va,
125 end);
126 return (0);
127 }
128
129 *pa = (va - (u_long) KERNBASE);
130 return (end - va);
131 }
132
133 /*
134 * Translate a physical address to a file-offset in the crash dump.
135 * XXX - crash dump doesn't work anyway.
136 */
137 off_t
_kvm_pa2off(kvm_t * kd,paddr_t pa)138 _kvm_pa2off(kvm_t *kd, paddr_t pa)
139 {
140 return(kd->dump_off + pa);
141 }
142
143
144 /*
145 * Machine-dependent initialization for ALL open kvm descriptors,
146 * not just those for a kernel crash dump. Some architectures
147 * have to deal with these NOT being constants! (i.e. m68k)
148 */
149 int
_kvm_mdopen(kvm_t * kd)150 _kvm_mdopen(kvm_t *kd)
151 {
152
153 kd->usrstack = USRSTACK;
154 kd->min_uva = VM_MIN_ADDRESS;
155 kd->max_uva = VM_MAXUSER_ADDRESS;
156
157 return (0);
158 }
159